When I used to do a lot of track days and eat tyres at a ridiculaous rate of knots, S02's were the road tyre for the track bar none. (If you catch my drift, not track tyres that can be used on the road)
Problem was they wore out too quick and could be killed in one track day. So I mainly used other brands like Toyo that were cheaper and would last two days.
I can't comment on S03's as never used them but the top end Bridgestone stuff has always been excellent...... but expensive!
You pays your money you takes your choice!